Improvement in pneumatic signaling apparatus



mi. FQSTEI@ Jl.

pmu/24u25@ /S/@Jzw zza? Alcan@ ljfajfrwws'. PATENTE APR 11 1871 WILLIAM FOSTER; JR., -oF NEW YORK, NQ Y.V

Letters Patent No. 113,646,dsted.pr".l11,1871.

IMPRQVEMENT iN PNEUMATIC SIGNALING APPARATUS.

The agneaux@ come so in urge Leem- Patsne ma making pue or un umu.

To all whom it may concern:

Be it known that Lfwmmkm Fosrna, Jr., of the city, county, and State of New York, have made a new and useful Improvement in ,Pneumatic-Signal Alarm and Telegraph Apparatus; and I hereby de' apparatus fontransmltting signals by means of' airA acting through a tube. In order to make auch apparatusgenerally applicable it must be simple in construetion, cheap in oost, and not liable to get out of order.

I have so far suooe'ededin this that, ,by my in; vention, an 'apparatus suitable for signaling over a distance lof several `hundred feet can be'constructed at a cost but little if any greater than that required for the ordinary vdevice :constructed by bell-hangers for similar purposes; and, at the` same time, much mora eioient in operation and much less liablet'c 'derangemeni't 'The-following description soft vulcanized India rubber or equivalent material, joined by a tube extending from the place at which the signal is to begiven' t'o'that alt which it is to be Second, a vibrating lever with 'one p artresting on the bulb at the receiving-end with '-suilicient forceto cause 'it vte be compressedor collapsed; and another 'cart carrying a hammerin 'auch a manner that when the bulb expands the hammer will strikeabellproperly placed, and, after the stroke, recoil or` leave the bell.

pler and cheaper than any heretofore produced.v

In the drawing- A shows a bulb of soit vulcanized I ndia rubber at the transmitting-end of the line; and

B, a similar bulb at the receiving-end, with the tube 0 oi lead or material'whicli will not expand undertheforce of the air within when transmitting.

a signal.

A lead tube of three-sixteeutbs of aninch diameter will answer for 'distances not exceeding three hundred and fifty feet.

Vwill lenable any one tol make and use my invention.

-First, I employ 'tweelastic bulbs or bellows of This arrangement produces ari-apparatus far sim-` Upon the bulb B rests a disk or plate, f crniiugipart of a lever, simple or compound, with which is connected the hammer, arranged so'as to strike the bell whenever the bulb B is made to expand suddenly by the sudden compression of the bulb A.,

In figs. '1 and -2.the vibrating lever is made vof' three parts, viz., a shaft, G, to which is rigidly attached -the disk D, and the hammerarm E, with weight D. But it is obv-ions thaty the' bulb B may be placed directly *under the weight D', so that D' will'serve both as a. disk tc'receive the epansive force of the bulb B, andalso4v as a weightto compress or collapse the vbulb B as soon as Vthe stroke is made and the bulb at the other end of the line released from corripression.

The shaft G is held between two bearing-screws l). b, which may be made to bind' more cr less, so as to give the lever the proper degree of freedom to vibrate.

' A stop, h, is placed so as to throw back the hammer-arm, so'that the hammer cannot rest against the bell.

In iig. 3 is shown a modification of my invention, sc'astc adapt itfor use with a' bell, such as the ordi- -ilary table-bell.

-lrr this case, the bulb B', atreceivinglend-of the line,.s placed in a cup, H, situatedabove the bell,

and the plate I), under' the bulb, as shown.

The sudden expansion of the bulb B' drives down the plate D and rings the bell in a manner quite s imilar to the stroke ofthe hand on the top of the ordinary table-bell.-

.lhe tube C may be concealed from view in this. case by beiu'gf made inside of oneof the supports shown insideof the bell.

The uses to which this improvement may be appliedl are quite numerous.

For 'conveying signals from the bouseto the various otices and out-buildings'it is far superior to any appa' ratus heretofore in"'us`e.`

For door-bell, hotel, and sho'p annunciators it is've'ry` convenient. 4

It is easily arranged as a bnrglanararm by plaoingthe bulb A. in'such position that, by the opening of1 a sash, door, or window, it;will hecoxnpressed, and an alarm will be given.

i When used. as 'a door-bell, the bulb A isplaced ina recess, so as to be compressed by the act of pulling the common bell-pull qr knocker.

Incas'et is desirable to signal through long distances, the apparatus maybe filled with compressed' air by means of an ordinary air-pump, which is" too modifi@ A pressure-gauge What claim,-'and desireto secure' by Letters Patentof the United States, is-' The combinati disk D, axle or shaft'. G, and

of the bulbs A and B, tube C,

hammer-arm E, all arranged and combined substantially as described.

Witnesses:

THOMAS D. STn'rsoN, l A. Honmfnm.'

WM. FOSTER, Jn. 

